Kalam & Rational Theology: The Mu’tazilite and Ash’arite Debates on Free Will and Divine Justice

Dr. Julian Vance & Sapiotic Engineering Group

September 6, 2026

Executive Briefing: The Clash of Classical Scholasticisms

The dispute between the rationalist Mu’tazilites and the traditionalist Ash’arites over the createdness of the Quran, the reality of human free will, and the rational knowability of ethics forged classical Islamic philosophy.

1. Kasb (Acquisition): The Ash’arite Middle Path

Imam Abu al-Hasan al-Ash’ari formulated the doctrine of Kasb (acquisition), asserting that God creates all human actions as the primary cause, while human beings freely “acquire” moral responsibility for those actions.

2. References

  1. Frank, R. M. (2008). Classical Islamic Theology: The Ash’arites. Variorum.
  2. Wolfson, H. A. (1976). The Philosophy of the Kalam. Harvard University Press.

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